It seems to me that on wet & rainy days, my car bogs a bit more. Take into consideration that I don't drive through puddles, and constantly check the filter. It's always dry, but the engine seems sluggish on wet days. Is it possible that the humidity alone is making that much of a difference, or am I imagining things? AEM CAI by the way.

 

im pretty sure basic physics dictates that dry air is more dense than wet air. so it could make a difference...but i dont think it'd be anything noticable.

 

Moisture in the air shouldnt do anything to your intake unless a lot of water has accumulated intake.

 

It could be the humidity and the way the air is..if its really damp, thats a weard one

 

I think that it does make a difference, but not a big one. When its raining out there, the atmoshphere is filled with a higher humidity level-water. You have that going right in to your intake. Far as it making a difference, if you really know your car, you may just barely notice it.